I shoot a 50 cal. 295 grain powerbelt with 100 grains of powder and it has never let me down. Just be careful because if you hit an elk high with a powerbelt they tend not to bleed very well. I switched to the aero tip powerbelts instead of the hollowpoints and it has made a noticeable difference in penetration. I have had 3 complete passthroughs on adult cow elk. Other than that it sounds like you are good to go.